Run the program on your desktop by double-clicking. Next, press on the "Open" option in the bottom left-hand corner to add a video file from computer's local folder. You can also go straight to import it to Joyoshare Media Cutter by dragging and dropping.
The video will play directly in the real-time media window after completed loading. Then you should go to "Format" > "Encoding mode" to select an output video format or device-compatible format for your Instagram video. If you're professional, you can go to adjust parameters in the upper-right gear corner of your chosen format.
In the main interface, find and click on "Edit"
button to further go for "Adjust" > "Crop Area Size". Herein, you are able to manually adjust the white cropping window or set specific size. Besides, you're allowed to choose a preferred automatic frame aspect ratio in the drop-down list, such as 16:9, 4:3, Pan Scan, Full Screen, etc. Either way, you'd better check the result in preview window first and finish with "OK".
When your video has been cropped to your satisfaction, you can click on the "Start" option to export and save it. After that, just head to the preset storage location or default location to check.